6Carter B G, Whittington N, Hochmann M, et al. The effect of inlet gas temperatures on heated humidifier per- formance[J]. J Aerosol Med, 2002,15 (1) : 7-13.
7Lellouche F, Taill6 S, Maggiore S M, et al. Influence of ambient and ventilator output temperatures on perfor- mance of heated-wire humidifiers[J]. Am J Respir Crit Care Med,2004,170(10) 1073-1079.
8Safdar N, Crnich C J, Maki D G. The pathogenesis of ventilator-associated pneumonia: its relevance to develo- ping ef{ective strategies for prevention[J]. Respir Care, 2005,50(6) 725-739.